公开(公告)号：US20190091908A1

公开(公告)日：2019-03-28

申请号：US15868388

申请日：2018-01-11

Applicant: PIONEER MATERIAL PRECISION TECH CO. LTD.

Inventor： Te-Ning CHEN ,  Jung-Hua SHEN

IPC: B29C45/16 ,  B29C45/00

Abstract: A process for making a protective shell unit for a handheld electronic device comprises steps of: a) injection molding a blend of a first plastic material and a phosphorescent pigment in a first mold cavity which defines a switch button portion-forming region to obtain a switch button portion; and b) injection molding a second plastic material in a second mold cavity which defines a shell body-forming region to integrally form a shell body with the switch button portion so as to obtain an integral shell.